Tesorb Signal: Tesla, SpaceX, and the Musk Companies

Neuralink promised high-volume production and automated surgery in 2026. Halfway through the year, 26 people have an implant. The chip works. The bottleneck is everything around it.

In 2011, Musk laughed at BYD on camera. In 2025, BYD sold 600,000 more electric cars than Tesla. How the crown changed hands, how BYD pulled it off, and why Tesla does not seem all that bothered.

Elon Musk added $116 billion to his net worth in a single move this month. But the money is the distraction. The stock options came with voting shares, and 25 percent control of Tesla is the number that has driven his decisions for years.

Tesla claims Full Self-Driving is ten times safer than human drivers. A fatal Houston crash just put that claim under a microscope. The real dispute is not whether the tech works. It is how the math is built.

Two weeks after the biggest IPO in history, SpaceX borrowed $25 billion more. The money is easy. The question is where it all goes, and who's funding the bet now that the doors are open.

"Just refuel in orbit." Three words stand between SpaceX and the Moon, and nobody can agree how many tanker launches it really takes. Part 2 of 2.

NASA hired SpaceX to land astronauts on the Moon. This year it quietly rewrote the mission. The next crew won't go anywhere near the Moon. They'll test the lander in Earth orbit and come home. Part 1 of 2.

Tesla just taped out AI5, its next AI chip. The headline calls it a faster self-driving brain. But the same design is meant to run the cars, the Optimus robot, and Tesla’s AI data centers. We unpack the one chip, three products bet, and the catch hiding underneath it.

In 2012, a single production line in Fremont started building the car that saved Tesla. Fourteen years later, that line is going quiet — and what Tesla wants to build on that floor next isn’t a car at all. It’s a robot you can’t buy. The Model S production line at Fremont was where Tesla ... Read more

There are more than nine million Teslas on the road, and a growing share of them run Grok, an AI built by a different Elon Musk company. We look at how the car quietly became a product for xAI, and what that says about where his empire is heading. Right now there are more than ... Read more

When the Cybertruck first went on sale, the cheapest one cost a hundred and twenty thousand dollars. This month, Tesla started delivering one for around a third of that. Almost everyone is reading the story wrong — because the headline is a cheaper truck, but the real story is the battery underneath it. This month, ... Read more

Neuralink gets the headlines, but the first brain implant approved to treat real patients came from China. We look at who actually shipped first, and why getting there first might mean something different than you think. For two years, the loudest story in brain implants has been Neuralink, with its viral demos and its promise ... Read more

Everyone knows SpaceX for rockets and Starlink internet. But the fastest-growing, most strategic part of the company is a classified defense network you can’t subscribe to, can’t see, and increasingly can’t ignore. This week, we follow the contracts instead of the launch photos. SpaceX has two faces. One is the storefront everyone can walk up ... Read more

For a year, the world watched a trillion-dollar Tesla pay deal billed as the path to the first trillionaire. Then a different company crossed the line first. This week, why the headline number wasn’t the one that mattered, and what a trillion dollars actually is. On Friday, Elon Musk became the first person in history ... Read more

SpaceX soared 19% in its historic debut. Almost every other space stock crashed the same day — some by a third. The untold story of the IPO is who fell while the giant rose, and what the market just said about the future of the space industry. On the day of the biggest stock market ... Read more

The biggest IPO in history hit the market today. Trading apps buckled, the stock jumped past its debut price, and Elon Musk crossed a line no human being has crossed before. Here is what actually happened, and what it really changes. SpaceX went public today — and the market answered the question we asked in ... Read more

For twenty years Elon Musk swore SpaceX would never go public. This week it becomes the biggest stock-market debut in history, worth more than Tesla, and for the first time the market — not Musk — gets to price the dream. SpaceX debuts on Nasdaq today at $135 per share, valued at $1.77 trillion — ... Read more

The AI race is really a power race, and Tesla is selling the shovels. This episode follows the bottleneck almost nobody saw coming — why chips aren’t the limiting factor, power is — and how Tesla’s Megapack quietly became essential infrastructure for every major AI data center. Everyone watches the chip war. But a chip ... Read more

Tesla is famous for cars, robots, and rockets. But its most profitable product is a plain gray battery box almost nobody talks about, and the story starts with a famous 100 day bet in the Australian outback. Everyone watches Tesla’s cars, its robotaxis, and its humanoid robots. Meanwhile the company’s most profitable product just sits ... Read more

A showroom only matters if the product sells somewhere else. Part two asks whether the Boring Company’s tunneling-cost machine can work in a city that isn’t Vegas — and what Baltimore’s one-day reversal reveals about the real bottleneck. Part 2 of 2 — The Boring Company Chapters [00:00] The city that said yes — and ... Read more

Everyone treats The Boring Company as a punchline. They are missing what it actually became. Part one of two on why the Vegas Loop is a showroom, not the product. Part 1 of 2 — The Boring Company Chapters [00:00] A ride that started as a joke [00:48] The Hyperloop that never came, and the ... Read more

The robotaxi race usually gets framed as a coin flip between Tesla and Waymo. The numbers on the board today tell a very different story. We compare the two on scale, safety, and the opposite bets they’re making on how to build a self-driving car. Chapters [00:00] Half a million driverless rides a week — ... Read more

The Model X was Tesla’s own Fabergé egg — beautiful, intricate, and nearly impossible to manufacture. Its falcon wing doors took two extra years and a lawsuit to ship. But the painful lessons from building it became the production discipline that made the Model 3 the best-selling EV in the world. Part 2 of 2 ... Read more

The Model S wasn't just a car. It was a proof point. Before it, electric vehicles were golf carts. After it, they were the best cars on the road. Part 1 of our series on the cars that built Tesla.

For almost sixteen years, Tesla was the only way to invest in Elon Musk's vision. The SpaceX IPO changes that. We break down what happens to Tesla's stock price when the 'Musk premium' has somewhere else to go.